void cpu_switch_context_exit(void)
{
active_thread = sched_threads[0];
sched_run();
__restore_context();
}
NORETURN void cpu_switch_context_exit(void)
{
sched_active_thread = sched_threads[0];
sched_run();
__restore_context();
UNREACHABLE();
}
void thread_yield()
{
__save_context();
dINT();
/* have active_thread point to the next thread */
sched_run();
eINT();
__restore_context();
}
/*
* we must prevent the compiler to generate a prologue or an epilogue
* for thread_yield_higher(), since we rely on the RETI instruction at the end
* of its execution, in the inlined __restore_context() sub-function
*/
__attribute__((naked)) void thread_yield_higher(void)
{
__asm__("push r2"); /* save SR */
__disable_irq();
__save_context();
/* have sched_active_thread point to the next thread */
sched_run();
__restore_context();
UNREACHABLE();
}
